Add elasticsearch_capture_body_urls option

[felixbarny]

Refs: https://github.com/elastic/apm-agent-nodejs/issues/2019 Closes: #665

We're only expecting to implement this in the Node.js agent in the near future. Other agents may add this to their roadmap as they see fit but we won't create a cross-agent tracking issue.

• [x] Create PR as draft
• [x] Approval by at least one other agent
• [x] Mark as Ready for Review (automatically requests reviews from all agents and PM via CODEOWNERS)
  • Remove PM from reviewers if impact on product is negligible
  • Remove agents from reviewers if the change is not relevant for them
• [ ] Merge after 2 business days passed without objections
  To auto-merge the PR, add /schedule YYYY-MM-DD to the PR description.

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• Start Time: 2022-08-16T11:14:28.625+0000

• Duration: 3 min 55 sec

[trentm]

Closes elastic/apm-agent-nodejs#2019 and #665

@felixbarny Are you okay with me changing that "Closes" to "Refs", so that the former issue isn't actually closed when this spec goes in? The issue should be closed when we implement the spec.

Update:

Oh, actually, I think what's wanted is:

Refs: https://github.com/elastic/apm-agent-nodejs/issues/2019
Closes: #665

[felixbarny]

As this affects all agents at least in the way the default behaves, I have created implementation issues for all agents and I'm waiting two more days for objections.